The Hybox 355 SHS 40x40x4 is a square hollow section reference entry for structural steel detailing and preliminary section identification. The source data lists its nominal depth, width, wall thickness, corner radii, sectional area, and unit weight.
Use the dimensional information below when checking drawings, comparing hollow-section references, or selecting a matching CAD profile. Any use in a structural design should be verified against the applicable design standard, material certification, connection details, and project loading.
Hybox 355 SHS 40x40x4
Hybox 355 Square Hollow Sections
refer to : EN 10219-2:2006-04
the European standard that specifies tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made of non-alloy and fine grain steels. It complements EN 10219-1, which covers technical delivery conditions.
Dimension : 40x40x4
Depth : 40 mm
Width : 40 mm
Thickness : 4 mm
Outer Corner Radius : 8 mm
Inner Corner Radius : 4 mm
Sectional Area : 5.35 cm2
Unit Weight : 4.2 kg/m
How to read this SHS reference
SHS means square hollow section. The section is identified by its outside depth and width together with its wall thickness. Because the section is cold-formed and welded, the listed corner radii are part of its geometric description rather than an incidental drafting detail.
Dimensions and corner geometry
The source lists equal outside dimensions for the square profile and gives separate outer and inner corner radii. These radii affect how the section appears in CAD, how connected parts fit around the corners, and how sectional properties are interpreted. Do not replace the rounded corners with a sharp-corner outline when preparing a detailed drawing.
Sectional area and unit weight
The listed sectional area describes the steel area used in section-property and mass calculations. The unit weight is the reference mass per unit length provided for estimating material quantities. Fabrication allowances, coatings, welds, and project-specific tolerances may require separate consideration.
Standard reference and CAD resource
This entry refers to EN 10219-2 for dimensions, tolerances, and sectional properties, while the related delivery-condition requirements are identified separately in the source content. Use the available DWG download as a drafting aid, then confirm the profile and project requirements before issuing fabrication or construction documents.
For broader context, readers may also compare this entry with references covering square hollow sections, rectangular hollow sections, steel section properties, and structural steel connections.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow structural steel profile with equal outside dimensions in the two principal directions.
What information is provided for this Hybox section?
The source entry provides the section designation, standard reference, outside dimensions, wall thickness, outer and inner corner radii, sectional area, unit weight, and a DWG download.
Why are the corner radii important?
Corner radii define the actual rounded geometry of the hollow section. They are important for accurate CAD representation, fit-up, detailing near corners, and interpretation of section properties.
Can the DWG file be used directly for structural design?
The DWG is a drafting reference. It should be checked against the project specification, the source dimensions, applicable standards, and the requirements of the responsible engineer before it is used in issued design or fabrication documents.
